my 2 years old and 5 months old gets car sick easily. She usually vomits when she gets car sick, but the vomiting usually stops after the ride is over or at most after a nap after the ride.

Since April, we went to a long trip to China, she vomited the whole day even after the trip and for the next 2 day, so we took her in the hospital. She was in the hospital for 4 days with iv drops, then she was released home, the doctor suspected it was Noro virus.

In June, we went to a friend's birthday event in Hong Kong, then she continues to vomit for one whole day, this time we took her to the hospital the same night, she continues to vomit in the hospital, this time she was in the hospital for 5 days! The diagnosis came back with no virus or infection, the same doctor confirmed that she has cynical vomiting, which only happens for 6 years old and above, but it was the best explanation for her

Now in Aug, after a trip back from Taiwan to Hong Kong, she does it again, I am a bit concerned if she is really "cynical vomiting" and is hesitant to take her in the hospital again, since it's really painfully to see her on the IV drops without any effective results!

Now I am giving her Oral rehydration solution slowly, hoping her vomiting would stop soon. Sigh.

My friend's three year old was just diagnosed with Cyclic Vomiting Symdrome. She had her daughter in the ER multiple times and the doctors always sent her home and said it was just a virus. During the last admission to the hospital she insisted they would not leave the hospital without answers. They ruled out many other conditions and diagnosed with CVS. Kids younger then six can have it. They can treat it with a couple different kinds of meds such as migraine drugs. Sometimes it takes a while to figure out what helps. Good luck